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Commit ceeee1fb authored by Greg Kroah-Hartman's avatar Greg Kroah-Hartman
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SYSFS: allow sysfs_create_link to create symlinks in the root of sysfs 



This is needed to make the compatible link for /sys/block in the future.

Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 6468b3af

fs/sysfs/symlink.c

+12 −2
Original line number Diff line number Diff line
@@ -3,6 +3,7 @@ 
 */



#include <linux/fs.h>

#include <linux/mount.h>

#include <linux/module.h>

#include <linux/kobject.h>

#include <linux/namei.h>
@@ -82,10 +83,19 @@ static int sysfs_add_link(struct dentry * parent, const char * name, struct kobj 
 */

int sysfs_create_link(struct kobject * kobj, struct kobject * target, const char * name)

{

	struct dentry * dentry = kobj->dentry;

	struct dentry *dentry = NULL;

	int error = -EEXIST;



	BUG_ON(!kobj || !kobj->dentry || !name);

	BUG_ON(!name);



	if (!kobj) {

		if (sysfs_mount && sysfs_mount->mnt_sb)

			dentry = sysfs_mount->mnt_sb->s_root;

	} else

		dentry = kobj->dentry;



	if (!dentry)

		return -EFAULT;



	mutex_lock(&dentry->d_inode->i_mutex);

	if (!sysfs_dirent_exist(dentry->d_fsdata, name))